DAF, Volvo and Scania N3 Rigids
Please be advised that the customer is responsible for supplying the tractor unit. Therefore, any issues related to the truck should be addressed with the manufacturer of the rigid chassis. Sayer's responsibility is limited to the tank and components that are not factory-installed by the truck's rigid manufacturer.
Refer to the information below for the appropriate contacts. Login details to bodybuilder portals are to be provided by the truck rigid manufacturer.
RMI & OBD
DAF, Volvo and Scania N3 Rigids
This page is provided to assist vehicle owners, repairers, independent operators and service providers in accessing repair and maintenance information and, where applicable, on-board diagnostic information relating to N3 rigid vehicles completed by Sayers Road Tankers Engineering Ltd.
This information is provided in accordance with the applicable requirements of Regulation (EU) 2018/858, as assimilated into UK law and amended, together with the applicable GB type approval framework.
Sayers Road Tankers Engineering Ltd carries out second-stage manufacturing and tanker body installation work on N3 rigid vehicles.
The base vehicle manufacturer remains responsible for repair and maintenance information and on-board diagnostic information relating to the original chassis, engine, transmission, emissions systems, braking system, cab systems, base vehicle electrical systems and base vehicle electronics.
Sayers Road Tankers Engineering Ltd can provide repair and maintenance information relating to the tanker body, tank installation, subframe, fitted tanker equipment and second-stage components installed or supplied by Sayers.
Login details and access requirements for base vehicle manufacturer RMI, OBD, bodybuilder portals or diagnostic systems are controlled by the relevant base vehicle manufacturer.
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Sayers Road Tankers Engineering Ltd N3 Completed Vehicle Approval References
Scania completed vehicle type: SRTN3N343
Scania completed vehicle approval number: g11*NKS*00553
DAF completed vehicle type: SRTN3F54N3
DAF completed vehicle approval number: g11*NKS*00629
Volvo completed vehicle type: SRTN3
Volvo completed vehicle approval number: g11*NKS*00630
Page Contents
1. Base Vehicle RMI & OBD Information
2. Tanker Body and Second-Stage Equipment Information
3. Additional Vehicle Systems and Component Information
4. Information Required When Requesting Support
5. Sayers Road Tankers Engineering Ltd Contact Details
1. Base Vehicle RMI & OBD Information
For N3 rigid vehicles, repair and maintenance information and on-board diagnostic information for the base vehicle must be obtained from the relevant base vehicle manufacturer.
This includes, but is not limited to:
engine and emissions systems;
transmission and driveline;
base vehicle braking system;
base vehicle suspension and axles;
cab systems;
base vehicle electrical and electronic systems;
base vehicle diagnostic software, fault codes and OBD information.
Independent operators can access base vehicle RMI and OBD information through the relevant manufacturer RMI portal, bodybuilder portal, authorised service network or technical support route.
Scania RMI Information
Completed vehicle manufactured by Sayers Road Tankers Engineering Ltd
Type: SRTN3N343
Sayers completed vehicle approval number: g11*NKS*00553
Scania base vehicle type approval number: e4*2018/858*00102
Scania CV AB
SE-15187 Södertälje, Sweden
Website: https://www.scania.com
Telephone: 0800 800 660
Scania RMI Portal:
https://www.scania.com/group/en/home/products-and-services/services/rmi/scania-rmi-portal.html
DAF RMI Information
Completed vehicle manufactured by Sayers Road Tankers Engineering Ltd
Type: SRTN3F54N3
Sayers completed vehicle approval number: g11*NKS*00629
DAF base vehicle type approval number: g11*NKS2018/858*00562
DAF Trucks N.V.
Hugo van der Goeslaan 1
5643 TW Eindhoven
The Netherlands
Website: https://www.daf.co.uk
Telephone: 0044 1844 218100
DAF RMI Portal:
https://rmi.daf.com/en
Volvo RMI Information
Completed vehicle manufactured by Sayers Road Tankers Engineering Ltd
Type: SRTN3
Sayers completed vehicle approval number: g11*NKS*00630
Volvo base vehicle type approval numbers: g11*2018/858*00533 and g11*2018/858*0538
Volvo Trucks
SE-405 08 Göteborg
Sweden
Website: https://www.volvotrucks.co.uk
Telephone: 01926 401777
Volvo Independent Operator RMI Portal:
https://www.independentoperator.eu/rmi/
2. Tanker Body and Second-Stage Equipment Information
Sayers Road Tankers Engineering Ltd can provide repair and maintenance information relating to tanker body installations and second-stage equipment fitted or supplied by Sayers.
This may include, depending on vehicle specification:
tank body and mountings;
subframe and body mounting arrangements;
tanker pipework;
valves, vents, manlids and tanker fittings;
pump and discharge equipment, where fitted;
tanker electrical additions and control systems.
For vehicle-specific information, including build details, fitted equipment, spare parts identification or available drawings, please contact Sayers Road Tankers Engineering Ltd using the contact details below in section 4.
3. Additional Vehicle Systems and Component Information
N3 rigid vehicles completed by Sayers Road Tankers Engineering Ltd may include additional systems and components depending on the vehicle specification, build date and customer requirements.
These may include, but are not limited to:
lighting and electrical additions;
body-related brackets and mountings;
sideguards and rear under-run protection;
access equipment, including walkways, ladders and handrails;
tanker control equipment;
PTO, pump and discharge-related equipment;
metering or measuring equipment, where fitted;
tanker valves, vents, manlids and pipework;
pressure, vacuum or discharge-related equipment, where fitted.
Where repair and maintenance information is controlled by the component manufacturer or the base vehicle manufacturer, the relevant official documentation, service instructions and technical support route should be used.
For vehicle-specific information, including build details, fitted equipment, spare parts identification or available drawings, please contact Sayers Road Tankers Engineering Ltd using the contact details below in section 4.
4. Information Required When Requesting Support
When contacting Sayers Road Tankers Engineering Ltd regarding an owned N3 rigid vehicle, please copy and complete the template below and include it in your email.
This information is also useful when contacting us by phone, as these are usually the first details we will ask for.
Sayers build number:
Vehicle chassis / VIN number:
Registration number, if applicable:
Base vehicle manufacturer and model:
PTO if applicable and known:
Metering/Pumping system make / model, if applicable to the enquiry and known:
Photos provided:
For example: issue/fault area, vehicle data plate, Sayers data plate, diagnostic fault codes or warning messages.
Brief description of the issue or information required:
Important Safety Note
Repair, maintenance and diagnostic work must only be carried out by competent persons using appropriate tools, equipment, diagnostic software and manufacturer instructions.
Safety-critical systems, including braking systems, suspension, axles, landing gear, coupling equipment, lighting, electrical systems and any tanker-related pressure or vacuum equipment, must be maintained in accordance with the relevant manufacturer’s instructions.
Where there is any doubt, the vehicle owner, repairer or independent operator should contact Sayers Road Tankers Engineering Ltd or the relevant component manufacturer before carrying out work.
5. Sayers Road Tankers Engineering Ltd Support
Technical Assistance for Tankers and Equipment
For any technical assistance related to tanker and equipment, please contact:
Jonny Allinson: jonny@sayerstankers.co.uk / Mobile: 07703 739869
Stuart Newton: stuart@sayerstankers.co.uk / Mobile: 07809 903077
Spares, Parts and information
For spares and parts, please contact:
Nicola Mitchell: nicola@sayerstankers.co.uk / Telephone: 01677 428919
Paul Daykin: paul@sayerstankers.co.uk / Telephone: 01677 428916
General information: info@sayerstankers.co.uk
Alternative sources of information:
If you seek alternative information for equipment servicing or other inquiries, which can usually be found on the equipment manufacturer's website, it will be used at the vehicle owner's own risk. Please contact us if you encounter any difficulties or are unsure how to resolve an issue with a vehicle supplied by us.
Page Review Information
Page reviewed: June 2026
Applicable vehicle category: N3 rigid vehicles
This page is reviewed periodically to help ensure that links, supplier information and contact details remain current. Vehicle-specific repair and maintenance information may depend on the trailer build specification, component manufacturer, build date and equipment fitted.
